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Australia
George Fisher Mine (Mount Isa Zinc Operation)

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 Location:
19 km N from Mount Isa, Queensland, Australia

  Address:
Private Mail Bag 6
Mount Isa
Queensland, Australia
4825
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Sub-level open stoping (SLOS)
Processing
  • Flotation
Mine Life18 years (as of Jan 1, 2021)
George Fisher mine is part of the Mount Isa Zinc Operation.
Latest NewsWagners hauls in Glencore contract renewal     May 10, 2021


Owners

Source: p. 17
CompanyInterestOwnership
Glencore plc. 100 % Indirect

Deposit Type

  • Breccia pipe / Stockwork


Summary:

George Fisher Mine (previously Hilton mine) is an underground zinc-lead-silver mine. It has two separate mining areas. The older Hilton mine is now known as George Fisher South and the newer mining area is George Fisher North (previously Hilton North).

The George Fisher orebody is an economic sulphide mineralisation. It is distinct from the nearby Mount Isa deposit due to its lack of breccia-hosted copper mineralisation. The deposit is composed of a series of 11 stratiform orebodies striking near N-S and dipping west between 30°-90°.

Lead-zinc-silver mineralisation occurs in galena and sphalerite-rich bedding parallel horizons in dolomitic and variably carbonaceous pyritic shales and siltstones. Orebody and structural interpretation, modelling and classification of the mineral resource was completed on the basis of additional geological information and improved systems.


Mining Methods

  • Sub-level open stoping (SLOS)


Summary:

The current extraction method at George Fisher is sublevel open stoping.

The mine is located on Mining Lease ML8058 and the lease expires on 30 November 2036.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

Zinc in Mount Isa
Ore mined is roughly crushed on site, then trucked to the Mount Isa mills for processing. First, the ore is ground into a fine dust via a series of ball mills. This dust is then mixed with water and reagents in zinc-lead concentrator's flotation circuit. The reagents help to separate the valuable mineral content from waste rock. Air is forced through the slurry creating bubbles, which float to the surface and attract and bind to the zinc or lead particles. The glossy, mineral-laden "froth" is then skimmed off the top and dried. What remains once the water content of the froth has evaporated is zinc or lead concentrate. Zinc concentrates are sold in the domestic market and exported overseas, while lead concentrate undergoes further processing and smelting on site to become crude lead, or lead bullion.

Lead concentrate is mixed with high grade silica, limestone and copper slag, a by-product of our copper smelting operations. These ingredients are known ........

Recoveries & Grades:

CommodityParameter2016
Zinc Head Grade, % 7.6
Lead Head Grade, % 4.5
Silver Head Grade, g/t 84

Production:

CommodityUnits2016
Zinc oz 0
Lead oz  ......  Subscription required
Silver oz  ......  Subscription required

Operational Metrics:

Metrics20212020201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required2.9 Mt2.9 Mt3.1 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2021:

CategoryTonnage CommodityGrade
Proven & Probable 63.2 Mt Zinc 7.2 %
Proven & Probable 63.2 Mt Lead 3.63 %
Proven & Probable 63.2 Mt Silver 64.1 g/t
Measured & Indicated 221 Mt Zinc 8.8 %
Measured & Indicated 221 Mt Lead 3.7 %
Measured & Indicated 221 Mt Silver 66.17 g/t
Inferred 77.4 Mt Zinc 8.7 %
Inferred 77.4 Mt Lead 3.5 %
Inferred 77.4 Mt Silver 63.8 g/t


Heavy Mobile Equipment as of March 1, 2022:
HME TypeModelQuantity
Loader ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
....................... Subscription required ....................... Subscription required Subscription required May 6, 2022
....................... Subscription required ....................... Subscription required Subscription required May 6, 2022
....................... Subscription required ....................... Subscription required Subscription required May 16, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
Year-end Mineral Reserves 2018
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2017
Other 2016
Year-end Mineral Reserves 2016
Other 2012
Subscription required - Subscription is required.

News:

NewsDate
Wagners hauls in Glencore contract renewal May 10, 2021

Aerial view:

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